Best Ethereum project to use as example...

I'm giving a talk on Thursday about how cryptocurrencies are much more than just a new kind of money.

As part of the presentation, I'll go through several projects based on different cryptoprotocols. What do you think would be the best Ethereum project to present to the audience? One that has realistic chances to get implemented.

The talk will part of ICT Spring Masterclasses. It's in Luxembourg on the 3d and 4th of July. Let me know if you plan to be there too